Error: FF wind array was exhausted at 43.225 seconds (trying to access data at 47.005 seconds)

OpenFAST / openfast

Main repository for the NREL-supported OpenFAST whole-turbine and FAST.Farm wind farm simulation codes.

http://openfast.readthedocs.io

Apache License 2.0

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Error: FF wind array was exhausted at 43.225 seconds (trying to access data at 47.005 seconds) #563

Closed jsurabhi501 closed 4 years ago

jsurabhi501 commented 4 years ago

Hello,

I am trying to run Test13 for the WP_1.5 MW tower to find out flexural moment at the top and bottom of the tower. First I run the test for 40s TMax and get results. Next time, I run the test for 100 s TMax I am getting a fatal error. Can you please guide me on how to solve this error? Is it related to the Dt-time step? Do they have specific limits to set the value of the DT-time step?

andrew-platt commented 4 years ago

You need a larger wind file. The wind file you have only contains 46.95 seconds of data. However, when the simulation initializes, the wind box is shifted downwind by a little more than half a wind turbine rotor, which for your turbine running in 12 m/s wind is a shift of ~7 seconds, so the wind box is past the turbine when the simulation ends at ~43 seconds.